Roll



Jan. 5, 1937. R. J. WlLKlE 2,066,755

ROLL

Filed Oct. 17, 1935 2 Sheets-Sheet l Jan. 5,1931 I R. J. WlLKIE ROLL Filed Oct. 17, 1935 2 SheetsSheet 2 /;iibenm m U",- I /drga 4% ,WMQML Patented Jan. 5, 1937 UNITED STATES ROLL Robert J. Wilkie, Newton, Mesa, assignor to Stowe-Woodward, Inc., Newton Upper Falls, Masa, a corporation of Massachusetts Application October 17,1935. Serial No. 45,445

9 Claims.

The principal object of my invention is to provide a roll which will combine great rigidity and light weight and which will be substantially as rigid as cast iron and cheaper to manufacture. While my invention is of great utility ior many purposes, yet it is especially useful with rolls used in connection with a paper machine where light weight and extreme rigidity are desirable characteristics. By way of example the rolls used to support the wire cloth on the wet end of a paper machine, commonly called table rolls, are customarily made of brass tubes, or either steel or aluminum tubes covered with rubber. As the width of the paper machine increases, with the rolls consequently longer, it has been increasingly diilicult to construct a roll which would not deflect or whip at high speeds and accordingly interfere with the formation of the sheet. The conventional method of meeting this problem has been to increase the diameter of the roll as well as the thickness of the tube, but this did not eliminate the whip satisfactorily, and was open to the further objection that the increased weight not only interfered with the shake but made the rolls difficult to handle when changing wires.

An object of my invention is to overcome these objections and to provide a roll which, when rotating at high speeds, even if the roll is of comparatively small diameter, will be rigid and of light weight, and. this I do by providing stiflening webs or ribs on the roll preferably extending axially of the roll and preferably these webs form pockets to receive portions of the rubber covering, in case a rubber covering is used.

Another feature of my invention is the insertion of a head in the ribbed roll. I

Still another feature is the provision of an inwardly-extending portion of the rubber covering to protect and cover the end of the tube.

Other features will be pointed out below.

In the drawings-- 4 Figure 1 is partly a section on line l-l of Figure 2, and partly an elevation, of a roll embodying my invention;

Figure 2 is an elevation of the same, partly in section on line 22 of Figure 1 and partly an elevation; I

Figure 3 is a section on line 3-3 of Figure 4, partly in elevation; and

Figure 4 is a section on line 44 of Figure 3, partly in elevation.

Tubular roll I is of anysuitable metal, such as steel, brass or aluminum and is made with ribs or webs 2, thus forming pockets or depressions within which fit projections 3 being, in the form shown, integral portions of the rubber, sleeve 4 which is a covering for the metal tube. These projections and the ribs extend, prefer- 5 ably, axially the full length of the tube. The journal 5 has a solid head 6, the latter being inserted into the tube I to a substantial extent and being formed with recesses to fit the ribs 2.

The rubber sleeve has at each-end, only one 10 being shown, an annular portion 1 extending radially inwardly to form a closure at the ends of adjacent surfaces of the tube and head and to cover the ends of the pockets.

It will be noted that the ribs 2 extending in- 15 wardly in the form shown, and the cooperating projections 3, prevent relative rotary movement between the tube and rubber sleeve; and the recesses in the head cooperate with the ribs on the tube I to prevent relative rotation between 20 the head and tube.

It is to be understood that both ends of the roll are similarly constructed although I show only one end.

In Figures 3 and 4 I show a form of my invention having a hollow tube 8 having depressed ribs 9, like ribs 2 of Figures 1 and 2, these ribs extending axially the full length of the tube. The covering material III is a brass tube or sleeve. Journal II is provided with an integral head i2 30 extending into, and fitting, the tube 8. A suitable cap l3 has a central bore which, by a frictional fit, engages the journal II, the cap being formed to extend outwardly, as at It, so as to cover the ends of the adjacent surfaces of tube 8 and cov- 35 ering material ill and also to cover the ends of the depressions 9. I show my invention as applied to one end of the tube 8 but it will be, of course, applied to both ends.

While I have described a rubber covering and 40 a brass covering other suitable covering material, such as bakelite, may be used.

For some purposes it is desirable to use a large number of rolls and the type of roll used prior to my invention limits the width of the machine be- 45 cause rolls of small diameter 'can not be made long enough and still have sufllcient structural strength.

The ordinary roll now used in paper making is too heavy, which is a disadvantage when the en- 50 tire table is shaken to consolidate the paper.

An advantage of my use of 'a rubber covering is that it will not pit from the action of water and will not be harsh on the wire cloth of a paper machine. 55

What I claim is:

l. A device of the character described comprising a roll member; and a rubber member outside the roll member; one of said members having depressions striking through the thickness of the member having said depressions and the other having projections cooperating with the depressions.

2. A roll comprising a tube provided with depressions striking through the thickness oi! the tube; and a rubber member outside the tube and having projections cooperating with said depressions.

3. A roll comprising a tube provided with peripheral depressions striking through the thickness of the tube; and a rubber member outside the tube and having integral projections cooperating with said depressions.

4. A roll comprising a tube member; and a head member having a portion within the tube member, one of said members being provided with depressions striking through the thickness of the member having said depressions and the other with projections cooperating with the depressions.

5. A roll comprising a tube provided with depressions striking through the thickness oi the tube; a rubber member outside the tube and having projections cooperating with said depressions at the inside of the depressions; and a head memher having a portion within the tube member. said portion having grooves cooperating with said depressions at the outside of the depressions.

6. A device of the character described comprising a hollow roll member having integral reeniorcing ribs extending inwardly oi the inner wall of the roll; and a member covering the roll.

7. A device of the character described comprising a hollow roll member having integral reeniorcing ribs extending inwardly oi the inner wall or the roll; and a rubber member covering the roll.

8. A device of the character described comprising a hollow roll member having integral reeni'orcing depressions extending axially of the roll and extending inwardly of the inner wall of the roll member to an extent to strike through the material of the roll; and a covering member for said roll member.

9. A device 01 the character described comprising a hollow roll member having integral reeniorcing depressions extending axially oi the roll and extending inwardly oi the inner wall of the roll member to an extent to strike through the material of the roll; and a rubber member covering said roll member, the rubber member having portions entering within, and engaging, said depressions.

ROBERT J. WILKIE. 

